doepfer - a little bit more expensive but built like a tank - there will be people with ones that are over 20 years old still going strong
mutable instruments links - about 3 times the price but not only do you get 2 buffered mults and a mixer, one of the mults can also be used as a pecision adder and a mixer - very very useful module
or just take a gamble on this one - it's 30quid! do you have anything to check it with?
"some of the best base-level info to remember can be found in Jim's sigfile" @Lugia
Utility modules are the dull polish that makes the shiny modules actually shine!!!
sound sources < sound modifiers < modulation sources < utilities